2001-02-11  Michael Natterer  <mitch@gimp.org>

	Made a GimpContainer out of the palette list:

	* app/Makefile.am
	* app/palettes.[ch]: new files for the global palette list.

	* app/gimpgradientpreview.[ch]
	* app/gimppalettepreview.[ch]: new widgets.

	* app/gimppalette.[ch]: derive it from GimpData to get all the
	preview etc. stuff.

	* app/datafiles.[ch]: new function datafiles_check_extension(),
	added a "loader_data" parameter to datafiles_read_directories()
	and pass it to the loader function.

	* app/gimpcontext.[ch]: added the palette (not really used yet
	except by the test dialogs).

	* app/gimpdatalist.[ch]: new function gimp_data_list_save_and_clear()
	which does everything needed for patterns_free(), brushes_free() ...

	* app/gimpdnd.c: added palette DND.

	* app/app_procs.c
	* app/brushes.c
	* app/color_notebook.h
	* app/commands.c
	* app/convert.c
	* app/gimpbrush.h
	* app/gimpbrushpipe.h
	* app/gimpgradient.c
	* app/gimppattern.h
	* app/gim...